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我有两个输入信号源，一个信号源的频率在200K左右，信号的幅度在20mV~5V之间变化；
另外一个信号源的频率在400K左右，信号的幅度在20mV~5V之间变化。
请帮忙推荐一个峰值检测电路，特别要求在20mV~500mV这个范围误差要小。
谢谢！
补充：是双电源供电。
